Ok, so one of my rear speakers had a blown voice coil, and I got sick of the rattling that occured on the lower frequencies.
Anyway I decided to do something about it, obviously it isn't really possible to find aftermarket speakers that fit straight in. I haven't gone with anything flash with the speakers, at the end of the day I still have the stock head unit. The replacement speakers I got were Kenwood 5 1/4" 3 way speakers.
Parts used:
The original mounting brackets that screw on to the underside of the speaker grills.
Replacement 5 1/4" speakers
A 100mm PVC bend that has both the male & female ends on it (I used a 90deg elbow)
5 minute araldite
Silicone
Hack saw or band saw
4 small screws
coarse sand paper
The major bits:
The speakers, nothing flash here:
The PVC elbow (note how it has a male and female fitting):
The original mounting brackets:
Ok first up you cut off two rings each 15mm deep of either side of your fitting, here you can see the markings for the first set of rings:
I had a band saw in the workshop which made cutting the rings a little easier, but you could do it with a hack saw also. Here are two male rings and two female rings. All 15mm deep: